To become evil as quickly as possible, complete the first two lands so that you are in the land where you must take over the towns, but not in competition with a tribe leader. Capture the villages with platoons to start being evil and at the same time use any tribute to buy the Torture Pit, Prison, and if possible, Hovels or Houses. Build lots of Hovels or Houses and some Villas and create many Disciple Breeders. Soon you should have a huge population. Win the land so the portal appears, but before you go into it, sacrifice everyone into the Torture Pits you built and place some in the Prisons if desired. Wait about ten minutes and you should become very evil. To speed up the process, destroy the buildings in the towns you captured with boulders and your Creature.